I don’t call things a “must buy” unless I absolutely love them. These are no exception! I had a pack of dryer balls before that I was okay with - I didn’t mind them but they never fully tried my clothes or made them appear more fluffy. These, however, so just that! I can use them in the dryer and I can notice how much fluffier my clothing is and all of my clothing actually comes out DRY regardless of the amount of clothes I put in. I love the cute little lamb details on them!